<?php

/**
 * @file
 * Describe hooks provided by the publishcontent module.
 */

/**
 * Allow other modules the ability to modify access to the publish controls.
 *
 * Modules may implement this hook if they want to have a say in whether or not
 * a given user has access to perform publish action on a node.
 *
 * @param node $node
 *   A node object being checked
 * @param user $account
 *   The user wanting to publish the node.
 *
 * @return bool|NULL
 *   PUBLISHCONTENT_ACCESS_ALLOW - if the account can publish the node
 *   PUBLISHCONTENT_ACCESS_DENY - if the user definetley can not publish
 *   PUBLISHCONTENT_ACCESS_IGNORE - This module wan't change the outcome.
 *   It is typically better to return IGNORE than DENY. If no module returns
 *   ALLOW then the account will be denied publish access. If one module
 *   returns DENY then the user will denied even if another module returns
 *   ALLOW.
 */
function hook_publishcontent_publish_access($node, $account) {
  $access = !$node->status &&
    (user_access('administer nodes')
    || user_access('publish any content')
    || (user_access('publish own content') && $account->uid == $node->uid)
    || (user_access('publish editable content') && node_access('update', $node))
    || (user_access('publish own ' . check_plain($node->type) . ' content', $account) && $account->uid == $node->uid)
    || user_access('publish any ' . check_plain($node->type) . ' content')
    || (user_access('publish editable ' . check_plain($node->type) . ' content') && node_access('update', $node))
  );

  if ($access) {
    // The user can publish the node according to this hook.
    // If another hook denys access they will be denied.
    return PUBLISHCONTENT_ACCESS_ALLOW;
  }

  // This function does not believe they can publish but is
  // not explicitly denying access to publish. If no other hooks
  // allow it then the user will be denied.
  return PUBLISHCONTENT_ACCESS_IGNORE;
}

/**
 * Allow other modules the ability to modify access to the unpublish controls.
 *
 * Modules may implement this hook if they want to have a say in whether or not
 * a given user has access to perform unpublish action on a node.
 *
 * @param node $node
 *   A node object being checked
 * @param user $account
 *   The user wanting to unpublish the node.
 *
 * @return bool|NULL
 *   PUBLISHCONTENT_ACCESS_ALLOW - if the user can unpublish the node.
 *   PUBLISHCONTENT_ACCESS_DENY - if the user definetley cannot unpublish.
 *   PUBLISHCONTENT_ACCESS_IGNORE - This module wan't change the outcome.
 *   It is typically better to return IGNORE than DENY. If no module returns
 *   ALLOW then the user will be denied access. If one module returns
 *   DENY then the user will denied even if another module returns
 *   ALLOW.
 */
function hook_publishcontent_unpublish_access($node, $account) {
  $access = $node->status &&
    (user_access('administer nodes')
    || user_access('unpublish any content')
    || (user_access('unpublish own content') && $user->uid == $node->uid)
    || (user_access('unpublish editable content') && node_access('update', $node))
    || (user_access('unpublish own ' . check_plain($node->type) . ' content', $user) && $user->uid == $node->uid)
    || user_access('unpublish any ' . check_plain($node->type) . ' content')
    || (user_access('unpublish editable ' . check_plain($node->type) . ' content') && node_access('update', $node))
  );

  if ($access) {
    // The user is allowed to unpublish the node according to this hook.
    // If another hook denys access they will be denied.
    return PUBLISHCONTENT_ACCESS_ALLOW;
  }

  // This function does not believe they can publish but is
  // not explicitly denying access to publish. If no other hooks
  // allow it then the user will be denied.
  return PUBLISHCONTENT_ACCESS_IGNORE;
}